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<h2>Xu li chuoi</h2>
public sealed class String : IComparable, ICloneable, IConvertible
<p>- Lop String duoc khai bao la sealed =\> khong the ke thua</p>

co the su dung = de so sanh nhung c# ho tro nap chong toan tu nhung
VB.NET chua chac da ho tro nap chong
nen de cho chac an nen su dung Equals

Tuong tu nhu java
C# cung co StringBuilder

String builder						String
thao tac vao doi tuong that			Thao tac tren ban sao

Bieu thuc chinh qui
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